Enceladus is currently in a 2 1 mean motion orbital resonance with Dione, completing two orbits of Saturn for every one orbit completed by Dione.
Io is in a 2 1 mean-motion orbital resonance with Europa and a 4 1 mean-motion orbital resonance with Ganymede, completing two orbits of Jupiter for every one orbit completed by Europa, and four orbits for every one completed by Ganymede.
The mission, conceived within the School of Aerospace Engineering, at the University of Rome "La Sapienza", employs two small probes (whose masses will be under 100 kg), placed in two orbits around the Moon, with a fixed ratio between their orbital periods.
For example, the region of the disk that completes two orbits for every three orbits of a planet is in a 3 2 orbital resonance.
The light energy is the difference in energies between the two orbits in the Bohr formula.
Buran performed flawlessly, completing two orbits before returning to Earth under remote control.
For example, if an electron jumps one orbit closer to the nucleus, it must emit energy equal to the difference of the energies of the two orbits.
The bony structure of the orbit has lagged even farther behind, and the axes of the two orbits make an angle of only about 45°.
In April 1947, the experiment found there was indeed a slight difference in energy between the two orbits generated by differences in how the electrons interacted with the ephemeral virtual particles.
Secular resonances, in which two orbits interact through the motions of their ascending nodes, perihelia, or both, operate over timescales of millions of years to change the eccentricity and inclination of asteroids.
Nevertheless, the two bodies will never collide, because Pluto is locked in a stabilizing 3 2 resonance with Neptune; i.e., it completes two orbits around the Sun in exactly the time it takes Neptune to complete three.
